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Yuzuru Hosoe - One of the best experts on this subject based on the ideXlab platform.
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reduction in Intermediate Layer thickness of cocrpt sio2 perpendicular recording media by using ru sio2
Journal of Applied Physics, 2006Co-Authors: I Takekuma, Ryoko Araki, Masukazu Igarashi, Hiroaki Nemoto, Ichiro Tamai, Yoshiyuki Hirayama, Yuzuru HosoeAbstract:A Ru–SiO2 Intermediate Layer was introduced between the Ru and recording Layers to reduce the Intermediate Layer thickness of CoCrPt–SiO2 perpendicular recording media. A structural analysis revealed that the Ru–SiO2 Intermediate Layer enhanced the oxide segregation in the initial growth region of the recording Layer. A micromagnetic simulation and magnetic property measurements indicated that the Ru–SiO2 Intermediate Layer reduced the intergranular exchange coupling in the initial growth region of the recording Layer without magnetic anisotropy degradation. We reduced the Intermediate Layer thickness down to 9.1nm by using the Ru–SiO2 Intermediate Layer while maintaining the signal-to-noise ratio.
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Reduction in Intermediate Layer thickness of CoCrPt–SiO2 perpendicular recording media by using Ru–SiO2
Journal of Applied Physics, 2006Co-Authors: I Takekuma, Ryoko Araki, Masukazu Igarashi, Hiroaki Nemoto, Ichiro Tamai, Yoshiyuki Hirayama, Yuzuru HosoeAbstract:A Ru–SiO2 Intermediate Layer was introduced between the Ru and recording Layers to reduce the Intermediate Layer thickness of CoCrPt–SiO2 perpendicular recording media. A structural analysis revealed that the Ru–SiO2 Intermediate Layer enhanced the oxide segregation in the initial growth region of the recording Layer. A micromagnetic simulation and magnetic property measurements indicated that the Ru–SiO2 Intermediate Layer reduced the intergranular exchange coupling in the initial growth region of the recording Layer without magnetic anisotropy degradation. We reduced the Intermediate Layer thickness down to 9.1nm by using the Ru–SiO2 Intermediate Layer while maintaining the signal-to-noise ratio.
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Effects of an Intermediate Layer on the magnetic and recording characteristics of CoCrPtTa media
Journal of Applied Physics, 2000Co-Authors: Kiwamu Tanahashi, Ichiro Tamai, Akira Ishikawa, Tetsuya Kanbe, Satoshi Matsunuma, Yoshibumi Matsuda, Yotsuo Yahisa, Yuzuru HosoeAbstract:Effects of bcc and hcp Intermediate Layers between a bcc–Cr80Ti20 underLayer and a hcp–CoCrPtTa magnetic Layer on magnetic and recording characteristics were investigated. The medium without an Intermediate Layer has a low coercivity Hc of 0.27 kOe due to the perpendicular orientation of the c axis of the CoCrPtTa Layer. By introducing a 5-nm-thick Intermediate Layer of bcc–Cr60Mo40 or hcp–Co70Cr30, the c axis of the CoCrPtTa Layer can be effectively in-plane oriented, resulting in a high Hc of 2.71–2.87 kOe and a coercive squareness S* of 0.72–0.81. The medium with the Cr60Mo40 Layer has lower media noise than the medium with the Co70Cr30 Layer. This lower noise is considered to be caused by the small grain size of 10.4 nm. The addition of the thin Cr60Mo40 Intermediate Layer is therefore effective to obtain both high Hc and low noise in the CoCrPtTa media with the CrTi underLayer.
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Reduction of thermal decay in longitudinal recording media with a CoCr Intermediate Layer
Journal of Magnetism and Magnetic Materials, 1999Co-Authors: Kiwamu Tanahashi, Ichiro Tamai, Yoshio Takahashi, Tetsuya Kanbe, Yuzuru HosoeAbstract:Abstract The effects of an HCP-CoCr Intermediate Layer between a BCC-CrTi underLayer and an HCP-CoCrPt magnetic Layer on the thermal stability of written bits have been investigated by measuring the change in signal output at room temperature as a function of time after transitions are formed. For media without Intermediate Layers, the decay of signal output was increasingly pronounced as the magnetic-Layer thickness decreased. The medium with a 10-nm-thick magnetic Layer showed a large decay of 4–7% 96 h after recording at a linear density of 100–225 kFCI. By introducing an Intermediate Layer, the decay was reduced to half that in the medium without the Intermediate Layer, while the medium noise was maintained at a low level. Cross-sectional TEM revealed that the magnetic Layer is epitaxially grown on the Intermediate Layer, forming an atomically sharp interface. The enhanced thermal stability appears to be due to the elimination of excessively small or disordered crystal grains at the initial growth Layer of the CoCrPt.
D L Kwong - One of the best experts on this subject based on the ideXlab platform.
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inverted tandem organic solar cells with a moo3 ag al ca Intermediate Layer
Applied Physics Letters, 2010Co-Authors: Xiao Wei Sun, Dewei Zhao, Aung Ko Ko Kyaw, D L KwongAbstract:An inverted tandem organic solar cell, consisting of two bulk heterojunction subcells with identical poly(3-hexylthiophene) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 active Layer, and an Intermediate Layer made of ultrathin multiple metal Layers of Ca/Al/Ag and metal oxide MoO3, is reported. This Intermediate Layer is of advantage in high transparency and low series resistance. Moreover, it serves as the charge recombination center effectively, and renders an exact summation of the open-circuit voltages (1.18 V) of the two subcells and a high fill factor (61.8%). The maximum power conversion efficiency obtained is 2.78% under simulated 100 mW/cm2 [air mass (AM) 1.5G] solar irradiation, comparable to those of the two subcells.
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efficient tandem organic solar cells with an al moo3 Intermediate Layer
Applied Physics Letters, 2008Co-Authors: Dewei Zhao, Changyun Jiang, Aung Ko Ko Kyaw, G Q Lo, D L KwongAbstract:We report efficient tandem organic solar cells with an Al and MoO3 Intermediate Layer. Such an Intermediate Layer with optimized thickness (1 nm Al and 15 nm MoO3) has high transparency (∼98% in the range from 350 to 900 nm) and efficient charge collections to realize electric connection in series. For polymer-small molecule tandem cell, due to the summation (1.01 V) of the open-circuit voltages of individual cells and a short-circuit current density of 6.05 mA/cm2, a power conversion efficiency (PCE) of 2.82% was obtained under 100 mW/cm2 illumination, which is larger than either of the individual cells. The PCE reached 3.88% when the tandem cell was illuminated under 300 mW/cm2. Additionally, we applied Al/MoO3 Intermediate Layer to realize a solution-processed polymer tandem cell with a high PCE (2.23%). The thick MoO3 (15 nm) provides a complete protection of the prior-deposited polymer Layer from dissolving during the top cell polymer coating.
Ichiro Tamai - One of the best experts on this subject based on the ideXlab platform.
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reduction in Intermediate Layer thickness of cocrpt sio2 perpendicular recording media by using ru sio2
Journal of Applied Physics, 2006Co-Authors: I Takekuma, Ryoko Araki, Masukazu Igarashi, Hiroaki Nemoto, Ichiro Tamai, Yoshiyuki Hirayama, Yuzuru HosoeAbstract:A Ru–SiO2 Intermediate Layer was introduced between the Ru and recording Layers to reduce the Intermediate Layer thickness of CoCrPt–SiO2 perpendicular recording media. A structural analysis revealed that the Ru–SiO2 Intermediate Layer enhanced the oxide segregation in the initial growth region of the recording Layer. A micromagnetic simulation and magnetic property measurements indicated that the Ru–SiO2 Intermediate Layer reduced the intergranular exchange coupling in the initial growth region of the recording Layer without magnetic anisotropy degradation. We reduced the Intermediate Layer thickness down to 9.1nm by using the Ru–SiO2 Intermediate Layer while maintaining the signal-to-noise ratio.
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Reduction in Intermediate Layer thickness of CoCrPt–SiO2 perpendicular recording media by using Ru–SiO2
Journal of Applied Physics, 2006Co-Authors: I Takekuma, Ryoko Araki, Masukazu Igarashi, Hiroaki Nemoto, Ichiro Tamai, Yoshiyuki Hirayama, Yuzuru HosoeAbstract:A Ru–SiO2 Intermediate Layer was introduced between the Ru and recording Layers to reduce the Intermediate Layer thickness of CoCrPt–SiO2 perpendicular recording media. A structural analysis revealed that the Ru–SiO2 Intermediate Layer enhanced the oxide segregation in the initial growth region of the recording Layer. A micromagnetic simulation and magnetic property measurements indicated that the Ru–SiO2 Intermediate Layer reduced the intergranular exchange coupling in the initial growth region of the recording Layer without magnetic anisotropy degradation. We reduced the Intermediate Layer thickness down to 9.1nm by using the Ru–SiO2 Intermediate Layer while maintaining the signal-to-noise ratio.
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Effects of an Intermediate Layer on the magnetic and recording characteristics of CoCrPtTa media
Journal of Applied Physics, 2000Co-Authors: Kiwamu Tanahashi, Ichiro Tamai, Akira Ishikawa, Tetsuya Kanbe, Satoshi Matsunuma, Yoshibumi Matsuda, Yotsuo Yahisa, Yuzuru HosoeAbstract:Effects of bcc and hcp Intermediate Layers between a bcc–Cr80Ti20 underLayer and a hcp–CoCrPtTa magnetic Layer on magnetic and recording characteristics were investigated. The medium without an Intermediate Layer has a low coercivity Hc of 0.27 kOe due to the perpendicular orientation of the c axis of the CoCrPtTa Layer. By introducing a 5-nm-thick Intermediate Layer of bcc–Cr60Mo40 or hcp–Co70Cr30, the c axis of the CoCrPtTa Layer can be effectively in-plane oriented, resulting in a high Hc of 2.71–2.87 kOe and a coercive squareness S* of 0.72–0.81. The medium with the Cr60Mo40 Layer has lower media noise than the medium with the Co70Cr30 Layer. This lower noise is considered to be caused by the small grain size of 10.4 nm. The addition of the thin Cr60Mo40 Intermediate Layer is therefore effective to obtain both high Hc and low noise in the CoCrPtTa media with the CrTi underLayer.
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Reduction of thermal decay in longitudinal recording media with a CoCr Intermediate Layer
Journal of Magnetism and Magnetic Materials, 1999Co-Authors: Kiwamu Tanahashi, Ichiro Tamai, Yoshio Takahashi, Tetsuya Kanbe, Yuzuru HosoeAbstract:Abstract The effects of an HCP-CoCr Intermediate Layer between a BCC-CrTi underLayer and an HCP-CoCrPt magnetic Layer on the thermal stability of written bits have been investigated by measuring the change in signal output at room temperature as a function of time after transitions are formed. For media without Intermediate Layers, the decay of signal output was increasingly pronounced as the magnetic-Layer thickness decreased. The medium with a 10-nm-thick magnetic Layer showed a large decay of 4–7% 96 h after recording at a linear density of 100–225 kFCI. By introducing an Intermediate Layer, the decay was reduced to half that in the medium without the Intermediate Layer, while the medium noise was maintained at a low level. Cross-sectional TEM revealed that the magnetic Layer is epitaxially grown on the Intermediate Layer, forming an atomically sharp interface. The enhanced thermal stability appears to be due to the elimination of excessively small or disordered crystal grains at the initial growth Layer of the CoCrPt.
I Takekuma - One of the best experts on this subject based on the ideXlab platform.
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reduction in Intermediate Layer thickness of cocrpt sio2 perpendicular recording media by using ru sio2
Journal of Applied Physics, 2006Co-Authors: I Takekuma, Ryoko Araki, Masukazu Igarashi, Hiroaki Nemoto, Ichiro Tamai, Yoshiyuki Hirayama, Yuzuru HosoeAbstract:A Ru–SiO2 Intermediate Layer was introduced between the Ru and recording Layers to reduce the Intermediate Layer thickness of CoCrPt–SiO2 perpendicular recording media. A structural analysis revealed that the Ru–SiO2 Intermediate Layer enhanced the oxide segregation in the initial growth region of the recording Layer. A micromagnetic simulation and magnetic property measurements indicated that the Ru–SiO2 Intermediate Layer reduced the intergranular exchange coupling in the initial growth region of the recording Layer without magnetic anisotropy degradation. We reduced the Intermediate Layer thickness down to 9.1nm by using the Ru–SiO2 Intermediate Layer while maintaining the signal-to-noise ratio.
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Reduction in Intermediate Layer thickness of CoCrPt–SiO2 perpendicular recording media by using Ru–SiO2
Journal of Applied Physics, 2006Co-Authors: I Takekuma, Ryoko Araki, Masukazu Igarashi, Hiroaki Nemoto, Ichiro Tamai, Yoshiyuki Hirayama, Yuzuru HosoeAbstract:A Ru–SiO2 Intermediate Layer was introduced between the Ru and recording Layers to reduce the Intermediate Layer thickness of CoCrPt–SiO2 perpendicular recording media. A structural analysis revealed that the Ru–SiO2 Intermediate Layer enhanced the oxide segregation in the initial growth region of the recording Layer. A micromagnetic simulation and magnetic property measurements indicated that the Ru–SiO2 Intermediate Layer reduced the intergranular exchange coupling in the initial growth region of the recording Layer without magnetic anisotropy degradation. We reduced the Intermediate Layer thickness down to 9.1nm by using the Ru–SiO2 Intermediate Layer while maintaining the signal-to-noise ratio.
Dewei Zhao - One of the best experts on this subject based on the ideXlab platform.
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inverted tandem organic solar cells with a moo3 ag al ca Intermediate Layer
Applied Physics Letters, 2010Co-Authors: Xiao Wei Sun, Dewei Zhao, Aung Ko Ko Kyaw, D L KwongAbstract:An inverted tandem organic solar cell, consisting of two bulk heterojunction subcells with identical poly(3-hexylthiophene) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 active Layer, and an Intermediate Layer made of ultrathin multiple metal Layers of Ca/Al/Ag and metal oxide MoO3, is reported. This Intermediate Layer is of advantage in high transparency and low series resistance. Moreover, it serves as the charge recombination center effectively, and renders an exact summation of the open-circuit voltages (1.18 V) of the two subcells and a high fill factor (61.8%). The maximum power conversion efficiency obtained is 2.78% under simulated 100 mW/cm2 [air mass (AM) 1.5G] solar irradiation, comparable to those of the two subcells.
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efficient tandem organic solar cells with an al moo3 Intermediate Layer
Applied Physics Letters, 2008Co-Authors: Dewei Zhao, Changyun Jiang, Aung Ko Ko Kyaw, G Q Lo, D L KwongAbstract:We report efficient tandem organic solar cells with an Al and MoO3 Intermediate Layer. Such an Intermediate Layer with optimized thickness (1 nm Al and 15 nm MoO3) has high transparency (∼98% in the range from 350 to 900 nm) and efficient charge collections to realize electric connection in series. For polymer-small molecule tandem cell, due to the summation (1.01 V) of the open-circuit voltages of individual cells and a short-circuit current density of 6.05 mA/cm2, a power conversion efficiency (PCE) of 2.82% was obtained under 100 mW/cm2 illumination, which is larger than either of the individual cells. The PCE reached 3.88% when the tandem cell was illuminated under 300 mW/cm2. Additionally, we applied Al/MoO3 Intermediate Layer to realize a solution-processed polymer tandem cell with a high PCE (2.23%). The thick MoO3 (15 nm) provides a complete protection of the prior-deposited polymer Layer from dissolving during the top cell polymer coating.
